Ray Scattering from a Collection of Ice Keels.

Abstract

An ice keel program that was described at the Spring 1985 meeting is used to investigate the acoustic scattering properties of ice keels at high frequency. Keels are modeled as parabolas. Sample sets of keels are generated using published distributions of spacing and sizes. A large number of rays are directed towards the keel set and the emerging rays are collected into angular bins. Reflections from and refraction through the ice are employed. Specular reflection coefficients computed in this manner are similar to published results above 3 deg grazing angle. No significant specular reflection is found at lower grazing angles. The scattered rays tend to be directed predominantly into angles near the specular angle. Keywords: Frequency scattering; Grazing angle; Specular angle; Emerging rays.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA191764

Entities

People

  • David F. Gordon

Tags

Communities of Interest

  • Air Platforms
  • Counter IED

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Angle Of Incidence
  • Availability
  • Classification
  • Coefficients
  • Frequency
  • Grazing
  • Grazing Angles
  • Losses
  • Low Angles
  • Materials
  • Scattering
  • Secondary Waves
  • Security
  • Specular Reflection
  • Transmission Loss
  • Waves

Fields of Study

  • Physics

Readers

  • Polar and Arctic Studies
  • Radar Systems Engineering.
  • Spectroscopy.

Technology Areas

  • Space